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Agate from Anzi, Maroc
Inclusions of hematite in feldspar (sunstone), India
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Midge included in amber from the Baltic coast, polarised light
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Twin-crystal of chrysoberyl
Natural etching structure on a crystal face of diamond (trigons), polarised light

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© SGG/SSG 2020

 

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